Flumazenil EP Impurity A

Chemical Name: 1-[Bis(p-fluorophenyl)methyl]piperazine; 1-(Di-p-fluorobenzhydryl)piperazine; 1-[Bis(4-fluorophenyl)methyl]piperazine; 4-[Bis(4-fluorophenyl)methyl]piperazine; N-(4,4'-Difluorobenzhydryl)piperazine; N-(Bis(4-fluorophenyl)methyl)piperazine

Smile: FC1=CC=C(C(N2CCNCC2)C3=CC=C(F)C=C3)C=C1